Assessment of the Response of Trenched–Backfilled Pipelines to Strike-Slip Faults: An Analytical Approach

Author:

Asgarihajifirouz Mozhgan1,Dong Xiaoyu1,Shiri Hodjat1ORCID

Affiliation:

1. Department of Civil Engineering, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada

Abstract

Trenched pipelines may experience significant lateral displacement due to natural geohazards such as strike slip-fault movements, landslides, etc. Using pre-excavated soil to backfill trenches is a cost-effective option to protect pipelines against large deformations. These backfilling materials are heavily remolded and therefore softer than the native ground. Therefore, the shear strength difference between the backfill and native ground may affect the pipeline–backfill–trench interaction and the failure mechanism of the surrounding soil. By assuming a simplified uniform soil domain, the influence of softer pre-excavated backfilling material on the pipeline–backfill–trench interaction is neglected in the analytical methods that are usually used in the structural health monitoring of buried pipelines. In this study, the effects of trenching and backfilling were incorporated into an analytical solution for a fast assessment of the pipeline response at the early stages of engineering design projects and structural health monitoring. In comparison with other methods, this methodology provides a convenient and efficient method for computing pipeline strain and deflection curves in geohazardous regions.

Funder

Wood PLC

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

Reference24 articles.

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2. Newmark, N.M., and Hall, W.J. (1975). Proceedings of the U.S. National Conference on Earthquake Engineering 1975, Ann Arbor, MI, USA, 18–20 June 1975, Earthquake Engineering Research Institute.

3. Fault Movement Effects on Buried Oil Pipeline;Kennedy;Transp. Eng. J. ASCE,1977

4. Seismic analysis of buried pipelines subjected to vertical fault movement;Vougioukas;ASCE J. Tech. Counc.,1979

5. MaCaffrey, M.A., and O’Rourke, T.D. (1983). Earthquake Behavior and Safety of Oil and Gas Storage Facilities, Buried Pipelines and Equipment, ASME. PVP-77.

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